Warm temperature in the mid- to upper-80s in the San Gabriel Valley and Whittier areas Monday will drop by 15 degrees or more today as a dry cold front sweeps into the region, forecasters said.

While the front won’t produce any chance of rain, it will be accompanied by strong, gusty winds, peaking early Wednesday morning, according to the National Weather Service, which issued a high wind watch advisory Monday.

“Potentially damaging” northerly winds will start to develop along the coast by this morning, spreading into the mountains above Los Angeles by this afternoon. By Wednesday morning, gusts as high as 75 mph are predicted, NWS meteorologist Rich Thompson said.

The high-wind watch is mostly for the local mountains, officials said. The strongest winds are expected through the Interstate 5 corridor, officials said.

The high wind watch means there is a potential for sustained winds of at least 40 mph, or that gusts of 50 mph or stronger may occur, the NWS said.

The cold front also will generate much cooler conditions, with maximum temps 15 to 20 degrees lower than Monday’s highs, forecasters said.

Some examples of the drop in temps include a high of 80 at Mount Wilson on Monday, falling to 63 today; 87 Monday, dropping to 70 today in San Gabriel; and 88 Monday, falling to a high of 71 today in Pasadena, according to the NWS.

Temperatures are expected to begin climbing again Thursday, returning to near normal by Friday and Saturday. Mostly sunny weather is expected throughout the rest of the week.